CVE-2026-59691

HIGHPre-NVD 7.17.1—
EchelonGraph scoreHIGH confidence

Score 7.1 from GitHub Security Advisory (severity: HIGH) published 2026-07-09. a secondary CVSS source baseline 7.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
7.1
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.1Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

A heap buffer overflow vulnerability was found in GStreamer's rfbsrc plugin. When a client connects to a malicious RFB/VNC server that advertises a 16bpp framebuffer and sends Hextile-encoded updates, the Hextile background fill path writes 32-bit pixel values into a buffer allocated for 16-bit pixels. This type mismatch causes an out-of-bounds heap write that can lead to denial of service (process crash) and potential memory corruption.

CVSS v3
7.1
EG Score
7.1(high)
EPSS
16.0%
KEV
Not listed

Published

July 9, 2026

Last Modified

July 9, 2026

Advisory Details (4)

Auto-updated Jul 9, 2026
Patch available. Sources: redhat.
generic

GStreamer / gstreamer · GitLab

https://gitlab.freedesktop.org/gstreamer/gstreamer/-/work_items/5173
generic

Sign in · GitLab

https://gitlab.freedesktop.org/gstreamer/gstreamer-security/-/merge_requests/100
redhat

2497343 – (CVE-2026-59691) CVE-2026-59691 gstreamer: gstreamer: rfbsrc/librfb Hextile heap out-of-bounds write with 16bpp framebuffer

https://bugzilla.redhat.com/show_bug.cgi?id=2497343
redhat Patch Available

cve-details

https://access.redhat.com/security/cve/CVE-2026-59691

Vendor Advisories for CVE-2026-59691(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 40× in last 7d / 40× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-16 00:52 UTCEG score recompute
  2. 2026-07-16 00:52 UTCGHSA enrichment
  3. 2026-07-15 16:57 UTCEPSS rescore
  4. 2026-07-15 16:57 UTCEPSS rescore
  5. 2026-07-15 13:35 UTCEG score recompute
  6. 2026-07-15 13:34 UTCGHSA enrichment
  7. 2026-07-15 02:15 UTCEG score recompute
  8. 2026-07-15 02:15 UTCGHSA enrichment
  9. 2026-07-15 02:00 UTCEPSS rescore
  10. 2026-07-15 02:00 UTCEPSS rescore
  11. 2026-07-14 14:57 UTCEG score recompute
  12. 2026-07-14 14:57 UTCGHSA enrichment
  13. 2026-07-14 03:40 UTCEG score recompute
  14. 2026-07-14 03:40 UTCGHSA enrichment
  15. 2026-07-13 22:31 UTCEPSS rescore
  16. 2026-07-13 16:23 UTCEG score recompute
  17. 2026-07-13 16:22 UTCGHSA enrichment
  18. 2026-07-13 06:13 UTCEPSS rescore
  19. 2026-07-13 06:13 UTCEPSS rescore
  20. 2026-07-13 05:01 UTCEG score recompute
  21. 2026-07-13 05:01 UTCGHSA enrichment
  22. 2026-07-12 17:42 UTCEG score recompute
  23. 2026-07-12 17:42 UTCGHSA enrichment
  24. 2026-07-12 06:24 UTCEG score recompute
  25. 2026-07-12 06:24 UTCGHSA enrichment
Show 15 more
  1. 2026-07-12 05:46 UTCEPSS rescore
  2. 2026-07-11 19:06 UTCEG score recompute
  3. 2026-07-11 19:06 UTCGHSA enrichment
  4. 2026-07-11 08:27 UTCEPSS rescore
  5. 2026-07-11 08:27 UTCEPSS rescore
  6. 2026-07-11 07:48 UTCEG score recompute
  7. 2026-07-11 07:48 UTCGHSA enrichment
  8. 2026-07-10 20:30 UTCEG score recompute
  9. 2026-07-10 20:30 UTCGHSA enrichment
  10. 2026-07-10 09:12 UTCEG score recompute
  11. 2026-07-10 09:12 UTCGHSA enrichment
  12. 2026-07-09 21:55 UTCEG score recompute
  13. 2026-07-09 21:55 UTCGHSA enrichment
  14. 2026-07-09 10:37 UTCEG score recompute
  15. 2026-07-09 10:35 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-59691?
CVE-2026-59691 is a high vulnerability published on July 9, 2026. A heap buffer overflow vulnerability was found in GStreamer's rfbsrc plugin. When a client connects to a malicious RFB/VNC server that advertises a 16bpp framebuffer and sends Hextile-encoded updates, the Hextile background fill path writes 32-bit pixel values into a buffer allocated for 16-bit…
When was CVE-2026-59691 disclosed?
CVE-2026-59691 was first published in the National Vulnerability Database on July 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-59691 actively exploited?
CVE-2026-59691 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 16.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-59691?
CVE-2026-59691 has a CVSS v3 base score of 7.1 (NVD).
How do I remediate CVE-2026-59691?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-59691, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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